You may think that your little pooping machine only aspires to crawl into trouble, but he also secretly hopes to be an outdoorsman like you one day. The Patagonia Infant Long Sleeve Boys' Capilene Daily Crew keeps your little man comfortable as you show him the outside world. A fabric constructied of polyester and spandex with UPF rated 50 sun protection and Polygiene odor control makes this shirt flexible, soft, and fresh after a day in the mountains. It's also Bluesign Approved, Fair Trade Certified, and has flat seams and raglan sleeves.